The tank is a 225. I never heard of it happened either. My ph probe in my calcium reactor had gel in it and I went to get some air out of the reactor and noticed a bunch of gel around the end of the probe. The tank was going just fine then started losing sps like crazy. Couldn't figure out what was going wrong. All the parameters were fine so thats what I think it was replaced the probe it's been a couple weeks the sps I have left are looking better. I dont know whats in the gel but I cant see it being reef safe.Omg ... I’ve never heard of this before ... how big was your tank?!